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-rw-r--r--mysql-test/t/variables_debug.test12
1 files changed, 12 insertions, 0 deletions
diff --git a/mysql-test/t/variables_debug.test b/mysql-test/t/variables_debug.test
new file mode 100644
index 00000000000..7dcaf246803
--- /dev/null
+++ b/mysql-test/t/variables_debug.test
@@ -0,0 +1,12 @@
+--source include/have_debug.inc
+
+#
+# Bug#34678 @@debug variable's incremental mode
+#
+
+set debug= 'T';
+select @@debug;
+set debug= '+P';
+select @@debug;
+set debug= '-P';
+select @@debug;